Infiniti I30. Emission Control System (2003 year). Manual — part 44
Wiring Diagram
NHEC0386
MEC564D
SEF796YD
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
INJECTOR
Wiring Diagram
EC-689
Diagnostic Procedure
NHEC0387
1
INSPECTION START
Turn ignition switch to “START”.
Is any cylinder ignited?
Yes or No
Yes
䊳
GO TO 2.
No
䊳
GO TO 3.
2
CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.
PBIB0133E
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-II
1. Start engine.
2. Listen to each injector operating sound.
PBIB1725E
Clicking noise should be heard.
OK or NG
OK
䊳
INSPECTION END
NG
䊳
GO TO 3.
INJECTOR
Diagnostic Procedure
EC-690
3
CHECK INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect injector harness connectors (bank 2) and harness connectors F58, F197 (bank 1).
SEC086D
SEC087D
3. Turn ignition switch “ON”.
4. Check voltage between injector terminal 1 and ground, harness connector F58 terminal 5 and ground with CONSULT-II
or tester.
SEF897XA
OK or NG
OK
䊳
GO TO 5.
NG
䊳
GO TO 4.
4
DETECT MALFUNCTIONING PART
Check the following.
쐌
Harness connectors M229, F66
쐌
Harness connectors F56, F197
쐌
Fuse block (J/B) connector M19
쐌
10A fuse
쐌
Harness for open or short between injector and fuse
쐌
Harness for open or short between harness connector F58 and fuse
䊳
Repair harness or connectors.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
INJECTOR
Diagnostic Procedure (Cont’d)
EC-691
5
CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector terminal 2 and ECM terminals 2, 11, 13, harness connector F58 terminals 6,
2, 1 and ECM terminals 1, 3, 12. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
䊳
GO TO 7.
NG
䊳
GO TO 6.
6
DETECT MALFUNCTIONING PART
Check the following.
쐌
Harness connectors F56, F197
쐌
Harness for open or short between harness connector F58 and ECM
쐌
Harness for open or short between ECM and injector
䊳
Repair open circuit or short to ground or short to power in harness or connectors.
7
CHECK SUB-HARNESS CIRCUIT FOR OPEN AND SHORT (BANK 1)
1. Remove intake manifold collector.
2. Disconnect injector harness connectors (Bank 1).
3. Check harness continuity between the following terminals. Refer to Wiring Diagram.
MTBL1173
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
䊳
GO TO 8.
NG
䊳
Repair open circuit or short to ground or short to power in harness or connectors.
8
CHECK INJECTOR
1. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.
SEF964XA
OK or NG
OK
䊳
GO TO 9.
NG
䊳
Replace injector.
INJECTOR
Diagnostic Procedure (Cont’d)
EC-692
9
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.
䊳
INSPECTION END
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
INJECTOR
Diagnostic Procedure (Cont’d)
EC-693
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0388
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
START SIGNAL
쐌
Ignition switch: ON
,
START
,
ON
OFF
,
ON
,
OFF
START SIGNAL
CONSULT-II Reference Value in Data Monitor Mode
EC-694
Wiring Diagram
=NHEC0390
MEC565D
SEF638XB
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
START SIGNAL
Wiring Diagram
EC-695
Diagnostic Procedure
NHEC0391
1
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
䊳
GO TO 2.
No
䊳
GO TO 3.
2
CHECK OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “START SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.
SEF072Y
OK or NG
OK
䊳
INSPECTION END
NG
䊳
GO TO 4.
3
CHECK OVERALL FUNCTION
Without CONSULT-II
Check voltage between ECM terminal 42 and ground under the following conditions.
SEF362XA
OK or NG
OK
䊳
INSPECTION END
NG
䊳
GO TO 4.
START SIGNAL
Diagnostic Procedure
EC-696
4
CHECK STARTING SYSTEM
Turn ignition switch “OFF”, then turn it to “START”.
Does starter motor operate?
Yes or No
Yes
䊳
GO TO 5.
No
䊳
Refer to SC-10, “STARTING SYSTEM”.
5
CHECK FUSE
1. Turn ignition switch “OFF”.
2. Disconnect 10A fuse.
3. Check if 10A fuse is OK.
OK or NG
OK
䊳
GO TO 6.
NG
䊳
Replace 10A fuse.
6
CHECK START SIGNAL INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Disconnect ignition switch harness connector.
3. Check harness continuity between ECM terminal 42 and ignition switch terminal 6. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
䊳
GO TO 8.
NG
䊳
GO TO 7.
7
DETECT MALFUNCTIONING PART
Check the following.
쐌
Harness connectors F66, M229
쐌
Fuse block (J/B) connectors M17, E83
쐌
Harness for open or short between ignition switch and ECM
䊳
Repair open circuit or short to ground or short to power in harness or connectors.
8
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.
䊳
INSPECTION END
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
START SIGNAL
Diagnostic Procedure (Cont’d)
EC-697
System Description
NHEC0392
Sensor
Input Signal to ECM
ECM func-
tion
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed
Fuel pump
control
Fuel pump relay
Ignition switch
Start signal
The ECM activates the fuel pump for several seconds after the ignition switch is turned on to improve engine
startability. If the ECM receives a 120° signal from the camshaft position sensor (PHASE), it knows that the
engine is rotating, and causes the pump to operate. If the 120° signal is not received when the ignition switch
is on, the engine stalls. The ECM stops pump operation and prevents battery discharging, thereby improving
safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump relay, which in turn
controls the fuel pump.
Condition
Fuel pump operation
Ignition switch is turned to ON.
Operates for 1 second.
Engine running and cranking
Operates.
When engine is stopped
Stops in 1.5 seconds.
Except as shown above
Stops.
SEC088D
Component Description
NHEC0393
The fuel pump with a fuel damper is an in-tank type (the pump and
damper are located in the fuel tank).
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0394
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
FUEL PUMP RLY
쐌
Ignition switch is turned to ON. (Operates for 1 second.)
쐌
Engine running and cranking
ON
Except as shown above
OFF
FUEL PUMP
System Description
EC-698
Wiring Diagram
NHEC0396
MEC371E
SEF639XC
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
FUEL PUMP
Wiring Diagram
EC-699
Diagnostic Procedure
NHEC0397
1
CHECK OVERALL FUNCTION
1. Turn ignition switch “ON”.
2. Pinch fuel feed hose with two fingers.
SEC089D
Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned “ON”.
OK or NG
OK
䊳
INSPECTION END
NG
䊳
GO TO 2.
2
CHECK FUEL PUMP RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect fuel pump relay.
SEF284X
3. Turn ignition switch “ON”.
4. Check voltage between fuel pump relay terminals 1, 5 and ground with CONSULT-II or tester.
SEF898X
OK or NG
OK
䊳
GO TO 4.
NG
䊳
GO TO 3.
FUEL PUMP
Diagnostic Procedure
EC-700
3
DETECT MALFUNCTIONING PART
Check the following.
쐌
Fuse block (J/B) connector B5
쐌
10A fuse
쐌
15A fuse
쐌
Harness for open or short between fuse and fuel pump relay
䊳
Repair harness or connectors.
4
CHECK CONDENSER CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect condenser harness connector.
3. Check harness continuity between fuel pump relay terminal 3 and condenser terminal 1, condenser terminal 2 and
body ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
䊳
GO TO 6.
NG
䊳
GO TO 5.
5
DETECT MALFUNCTIONING PART
Check the following.
쐌
Harness for open or short between fuel pump relay and condenser
쐌
Harness for open or short between condenser and body ground
䊳
Repair open circuit or short to ground or short to power in harness or connectors.
6
CHECK CONDENSER
1. Turn ignition switch “OFF”.
2. Disconnect condenser harness connector.
3. Check resistance between condenser terminals 1 and 2.
SEF124Y
Resistance: Above 1 M
Ω
at 25°C (77°F)
OK or NG
OK
䊳
GO TO 7.
NG
䊳
Replace condenser.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
FUEL PUMP
Diagnostic Procedure (Cont’d)
EC-701
7
CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect fuel level sensor unit and fuel pump harness connector.
SEC082D
3. Check harness continuity between fuel pump terminal 3 and body ground, fuel pump terminal 1 and fuel pump relay
terminal 3. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
䊳
GO TO 9.
NG
䊳
GO TO 8.
8
DETECT MALFUNCTIONING PART
Check the following.
쐌
Harness for open or short between fuel pump relay and fuel pump
쐌
Harness for open or short between fuel pump and body ground
䊳
Repair open circuit or short to ground or short to power in harness or connectors.
9
CHECK FUEL PUMP RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 23 and fuel pump relay terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
䊳
GO TO 11.
NG
䊳
GO TO 10.
10
DETECT MALFUNCTIONING PART
Check the following.
쐌
Harness connectors B3, M6
쐌
Harness connectors M81, F49
쐌
Harness for open or short between ECM and fuel pump relay
䊳
Repair open circuit or short to ground or short to power in harness or connectors.
FUEL PUMP
Diagnostic Procedure (Cont’d)
EC-702
11
CHECK FUEL PUMP RELAY
With CONSULT-II
1. Reconnect fuel pump relay, fuel level sensor unit and fuel pump harness connector and ECM harness connector.
2. Turn ignition switch “ON”.
3. Turn fuel pump relay “ON” and “OFF” in “ACTIVE TEST” mode with CONSULT-II and check operating sound.
SEF073Y
Without CONSULT-II
Check continuity between terminals 3 and 5 under the following conditions.
SEF608X
OK or NG
OK
䊳
GO TO 12.
NG
䊳
Replace fuel pump relay.
12
CHECK FUEL PUMP
1. Disconnect fuel level sensor unit and fuel pump harness connector.
2. Check resistance between fuel level sensor unit and fuel pump terminals 1 and 3.
SEC918C
Resistance: 0.2 - 5.0
Ω
[at 25°C (77°F)]
OK or NG
OK
䊳
GO TO 13.
NG
䊳
Replace fuel pump.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
FUEL PUMP
Diagnostic Procedure (Cont’d)
EC-703
13
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.
䊳
INSPECTION END
FUEL PUMP
Diagnostic Procedure (Cont’d)
EC-704
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